Adjustable liquid metering device



Nov. 26, 1940. F. w. GulBr- RT Erm. 2,222,660

ADJUSTABLE LIQUID METERING `DEVIQTE oiginal FiledfAug. 5, i956 6l sheets-sheet 1 l N V E NTO R 5 Frcmcs Walier Guberi' Freder B` Fuller' BY ATTORNEY Nov. 26, 1940. F. w.-GU|BERT Erm. 2.222,66()

` ADJUSTABLE LIQ-UID METERING -DEVICE u' Original Filed Aug. 5, 1936l 4 Sheets-Sheet 2 2 F'IG. 3

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5 me 8 f f i3? l f r |57 |02 I6! u H62 |63 l INVENTORS Francs Wal'er Ciuberi, 5, Fr ri Fuller |84 G l 1 @Y ZUM ATToRNEY Nov, 2 6, 1940. F. w. GUIBERT Erm. 2.222,66()

ADJUSTABLE LIQUID M'I'ERINGA DEVICE Original Filed Aug. 5, 1936 6 Sheets-Sheet 3 Ax47 `F1616 mmm-7,7 E?

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7. Z Il 5 oo 5 H 54 ne 2 1 M i n m. fri C. mm 0 2 Q4] f. /.II8 .,w,\ G ,J 5 am l N 5 @y l y. 7v 5. 5 .V L W Nov.'26, 1940, F. w. GUIBERT Erm. 2,222,660. ADJUSTABLE LIQUID METERING DEVICE l original Filed Aug. 5, 193e e sheets-sheet 4 9,- i FIG. 8.

|38 |30- A4-3 l INVENTORS I Francis Wall'er Guberl' (|40 I; Frederic B.. Fuller Go* I: 44 l \2? BY b I 59 |24- ATTORN EY Nov. 26, l1940. F, w GulBER-r E- l-AL 2,222,660

ADJUSTABLE LIQUID METERING DEVICE Original Filed Aug. 5, 1936 6 Sheets-Sheet 5 Francis Walter Guibert E i B. Fuller a M ATTORNEY Nv.2s,194o. Ew. @Ulm-:RT Em 2,222,660

' ADJUSTABLE LIQUID METERING- DEVICE Original Filed Aug. 5, 1936 6 Sheets-Sheet 6 mvENToRs Franc Wolier Guberf' Fredec 5. Fuller BYjUN/uw A l ATTORNEY,

Patented Nov. 26; y 1940 2,222,660 j I ADJUSTABLE LIQUID ME'IEBmG DEVICE Francis Walter Guibert, Beverly Hills. and V Frederic B. Fuller, Whittier, Calif.; said Fuller assignor to said Guibert Application August 5, 1936, Serial No. 94,408

Renewed July 22. 1939 A11 Claims. ,(Cl. 221-101) batches are delivered, and the amount deliv-y ered may be set or adjusted.

Such a measuring device is shown in a prior.

application, led June 5, 1934 in the name of Francis Walter Guibert, entitled Liquid measur- 10 ing device, Serial Number 729,102; and patented OctoberlS, 1936, No. 2,057,333.

In such devices, it has been proposed to utilize a valve controlled by a meter having rotatable elements in the path of the liquid being metered. It is one oi the objects of this invention to improve the device by utilizing a different form of meter; speciilcally, by the provision of a meter of the piston displacement type.

Such a meter can be calibrated to be quite 2 accurate under normal conditions ofv operation. However, problems arise when the liquid passed to themetering device has .a pressure variable within wide limits. Under high pressure operation, irictional forces may be producedthat seriously affect the accuracy of the meter, and this is especially true where generously proportioned valves are provided for controlling the displacement piston meter. It isranother object of this invention to obviate the creation of large frictional forces in the operation of the piston displacement meter, whereby no appreciable inaccuracy mayoccur.

In metering devices of this character, it has been proposed to provide an adjustable-rest or abutment which cooperates with a member moved by the meter. in order to limit this motion. and thereby -to determine the amount of liquid delivered in the cycle. The adjustment was usually accomplished by a mechanism similar to a pawl and ratchet. In order obtain ilne graduations. numerous small teeth had to be, provided. This arrangement, while generally satisfactory, involved expensive machine work and made it lmpossible to adjust the quantity except in increments determined by the tooth spacing. It is another object of this invention to make it possible to adjust the volume delivered in a continuous manner as distinguished `from the discontinuous manner discussed herein. It is still another`object of this invention to -make it possible to alter vin a simple manner,

,the range of operation of the device, as regards l fifty gallons; bythe aid of this invention, it is a simple matter to alter the range of adjustment, say, from zero y to several hundreds of gallons, or even higher.

The metering device is intended to be used 5 for metering liquids in general, including water for use in concrete'mixing plants. The source of liquid supply may be such that foreign matter or dirt may be carried into the device with the liquid, and, in due time, clog the mechanism 10 suiciently to render the device inoperative. It has been proposed to provide a screen for preventing such an occurrence; but experience has, demonstrated that these screens inevitably become so loaded as substantially to stop the Iflow l5 of liquid. Accordingly, operators of the metering device often cut out the screen when this condition is reached; and the benefits of the screen are lost. It .is accordingly another object of this invention to provide a screen struc- 20 ture which is readily removable for cleaning or replacement.

It is still another object of this invention to provide a control mechanism of simpleform for initiating the delivery cycle,l and for ensuring 25 that the cycle will be completed before a new one can commence.

It is still another object of the invention to provide -a valve control mechanism by the aid of which water hammer or other forms of harm- 30 ful transient phenomena are eliminated.

It is still anothe'r .object of the invention to provide a simple calibrating adjustment for the piston displacement meter which measures the volume of liquid iowing through the device. 35

It is still another object of this invention to provide a iluid tight casing for the meter, so

.arranged that in case any dangerously high provide an indicating means which shows di- 45 rectly at all times how much liquid is still to be delivered in the cycle before the cycle is completed.

This invention possesses many other advantages, and has other objects which may be made 5o l more easily apparent from a consideration of one embodiment of the invention. For this .purpose there is shown a form in the drawings accompanying and forming part of the ln'esentv speciilcation.4 This iorm now be described in detail, illustrating the general principles of the invention; but it is to be understood that this detailed description is not to be taken in a limiting sense, since the scope of this invention is best defined by the appended claims.

Referring to the drawings:

Figure 1 is a front elevation of a device embodying the invention; Fig. 2 is a top plan view thereof; A

Fig. 3 is a view mainly in section, taken along plane 3 3 of Fig. 1;

Fig. 4 is a fragmentary sectional view taken along plane 4-4 of Fig. 3;

Fig. 5 is a detail fragmentary sectional view taken along plane 5`5 of Fig. 3;

Fig. 6 is a sectional view taken along plane 9-6 of Fig. 2;

Fig. 7 is a fragmentary sectional view taken along the plane 1-1 of Fig. 6;

Fig. 8 is an enlarged horizontal sectional view taken along plane V8-8 of Fig. 3;

Fig. 9 is a sectional view taken along plane 9-9 of Fig. 8;

Fig. 10 is a fragmentary sectional view taken along plane III- I0 of Fig. 8;

Fig. 11 is a sectional view taken along the plane II-II of Fig. 8;

Fig. 12 is a detail sectional view taken along plane I2-I2 of Fig. 10;

Fig. 13 is a sectional view taken along plane I3--I3 of Fig. 3; 1

Fig. 14 is an enlarged sectional view taken along plane III-I4 of Fig. 6;

Fig. 15 is a view similar to Fig. 8, but showing a closed position ofv the mechanism;

Fig. 16 is a fragmentary view similar to Fig. 12, but illustrating a different position of the operating parts;

Fig. 17 is a view similar to Fig. 15, but showing an intermediate or dribble position of the control mechanism; Y'

Fig. 18 is a fragmentary view of the main control valve shown in fully opened position; and

Fig. 19 is a detail sectional view taken along plane I9--I9 of Fig. 3.

The liquid measuring device includes in general three main elements: a liquid flow meter; a control valve through which the liquid to be metered is passed; and a control mechanism whereby the valve is operated to; close at the end of a metering cycle. These elements are all conveniently supported on a common base I, the structure of which will be hereinafter more completely described. The base I is shown to best advantage in Fig. 13.

In the present instance the liquid flow meter 2 (Figs. 1, 2, 3 and 6) serves to measure the volume of liquid being delivered. When a predetermined amount has been delivered, the control mechanism 3 (Figs. 2, 3 and 7) serves to close the control valve 4 (Figs. 2, 6, 7 and 18) to complete the cycle which began with the opening of valve 4.

The control valve I may be located anywhere in the path of the liquid ow. In the present instance, it ls shown located ahead of the liquid flow meter 2. It is provided with an intake conduit 5 (Figs. l, 2 and 7) adapted to be connected to a source of liquid supply under pressure, such as the water mains or a gasoline reservoir or the like. The liquid passes through the valve Il and is discharged through it into a chamber 5 formed in the base I. (Figs. 3, 4, 6, 7 and 13.) Another chamber 1 is formed in the base I as by the aid of the walls 8, 9, I9 and Ii (Figs. 3, 6

aaaaoeo and 13). These chambers I and 1, as shown most clearly in Figs. 3, 6 and 7, have openings in the 'top of the base I. These openings are closed by appropriate flanges hereinafter to be described formed on the bottom of the control valve 4 and the liquid flow meter 2.

The liquid flow lmeter 2 has an inlet connection with the chamber 6 and an outlet connecting with the chamber 1. This chamber 1 communicates with an upright conduit I2 (Figs. 1, 2 and 7) which discharges the liquid from the device to the place where it is to be used. It is thus apparent that the base member I, in addition to its function of supporting the units 2 and 4, also serves to provide chambers 6 and 1 for connecting these units together.

The valve 4, which is connected to the intake conduit 5, will now be described. Conduit 5, as shown most clearly in Fig. 2, is provided with a flange I3 by the aid of which it may be connected to a corresponding flange I4, formed integral with the main valve casing I5 (Figs. 6, 7 and 18). This casing I5 has an elbow IG (Figs. 2 and 7) leading from the flanged aperture in the casing to a tubular extension I1 This tubular extension has a cap I9 which closes the open end of the extension I1. A wire mesh screen I9 (Figs. 6 and 7) is annularly spaced from the walls'of the extension I 1, and itsinterior at its left hand end is in communication with the elbow I6. In this way, liquid passing through conduit 5 and elbow I6 will pass to the inside ofthe cylindrical screen I9, and will then pass through the screen and downwardly into casing I5. This screen I9 serves to catch dirt or foreign matter which would otherwise enter the device and interfere with its efficient operation.

The screen I9 is removably held by the aid of a shoulder 20 formed on the flange 22 on the inside of the elbow I6, and a shoulder 2i formed on the inside of cap I8. 'Ihis flange 22 surrounds the outlet of elbow I6 and encompasses the left hand end of the screen I9. It is apparent that by removing the cap I8 the screen I9 may be removed or replaced or cleaned as occasion may require.

As shown most clearly in Figs.` 2 and 6,the cap I8 may be provided with an extension passage 23 connecting to an ordinary spigot valve 24, making it possible to withdraw liquid from the source of supply before it passes to the metering elements or through the valve 4. This liquid so withdrawn may serve to carry offany accumulation of dirt.

The valve body I5 has a lower tubular portion extending downwardly from the extension I1, as shown most clearly in Figs. 6, 7 and 18. This tubular portion is provided with a flange 25, through which fastening bolts 26 may be passed to hold this casing I5 rigidly to the base I. The valve seat 21 is formed separate from the casing I5 and is provided with an intermediate flange 23 clamped between the base I andthe flange 25. Appropriate packing may be provided between the flanges 25 and 28 and between flange 28 and base I in order to ensure a fluid tight construction.

The valve seat 21 is provided with a sloping valve opening 29 which serves, when the valve 4 is open, to pass liquid from the casing I5 to the chamber'i in base I.

'I'he main valve closure in this instance is shown formed by the aid of' a piston 3|). 'I'his piston 30 is accommodated for axial movement in a cylinder 3|, concentric with the lower portion the chamber 6 of the base I.

somewhat larger in size than the restricted open-I of the casing I5. This cylinder 3| may be provided with a supporting flange 32 accommodated in a. recess 33 in the flange 28 of the valve seat 21. This flange 32 for supporting the cylinder 3| is connected to the cylinder by the aid of a series of supports 34 (Figs. 6, 7 and 18). It is apparent that the lower end of cylinder -3| is open to the inside of casing I5, whereby liquid may flow between the supports 34 and downwardly through thevalve Seat 29 when the valve closure 30 is open.

The piston closure member 36 is provided with a bottom flange 35 from which extends a central threaded boss'36. The closure member proper 31 is held tightly against the flange 35` by an l interiorly threaded flange member 38, engaging the boss 36, and provided with the guide wings 39. This closure member proper 31 may be made from any appropriate material, such as leather or fibre. It has a sloping face adapted to cooperate with the face 26 of the seat 21. It is apparent that when the piston closure member 30 is urged downwardly, the member 31 will be seated against the seat 29 to close the valve.

The closed position of the valve 4 is indicated in Fig. 6. It is held in closed position mechanically, as well as by fluid pressure. Thus for example, there may be arestricted opening 46 in the top of the cylinder 3| by the aid of which the cylinder chamber is placed inA communication with the liquid in the casing I5. 'Ihe liquid within the cylinder 3l urges the piston 38 toward closing position. An appropriate screen 4| may be provided above the restricted opening 40.

The opening and closing of the valve 4 is controlled, however, by an auxiliary closure member 42 movable in a direction parallel with the movement ofl piston 30. This auxiliary member 42 is shown in the present instance as a pin or rod coaxial with the piston 38 and guided for axial movement in a boss 43, depending from the top Wall of the cylinder 3|. The'lower endof the auxiliary closure member 42 is formed as a needle valve being in the form of a conical tip 44. 'I'his conical tip 44 cooperates with a port 45 leading directly through the closure member 30 and into 'I'his port 45 is ing 40.

In order to open the valve 4, the auxiliary closure member 42 is lifted, permitting liquid to ow through the port 45. Since this port 45 is larger than restricted opening 40, it is apparent that liquid passes from the cylinder 3| faster than the 'supply of liquid thereto throughthe opening 40. The result is a reduction in pressure in the cylinder chamber, whereupon the pressure below the piston closure 30 overpowers the pressure within the cylinder chamber. The valve closure member 38 therefore follows theupward movement of the member 42 and the valve opens by the differential liquid pressure thus obtained. The port 45 will thus be brought tojapproach the point 44, but will not be brought to a completely L closed position.v Afpcondition of equilibrium will movement is rendered free. The fully opened po.

sition of valve 4 isl shown inFlg. 18.

The closure of valve 4isaccomplished by a downwardy movementof theauxiliary closure 42.

casing 58 (Figs. 7 and 8).

This downward movement causes the piston 30 to move toward closing position, and upon completion of its movement, as shown in Fig. 6, it is there held in closed position, as by the liquid pressure which exists in the cylinder 3 I.

As will be described hereinafter, the closing of the valve 4 is made in more than one step in order to avoid water hammer or other harmful tran.- sient eifects-l In the present instance there is an intermediate or dribble position, in which the auxiliary closure 42 has not quite urged the piston 30 to the closed position of Fig. 6. In order to permit the passage of a substantial amount of liquid past the closure ring 31 even when this closure ring is veryl close to the seat 26, the flange member 38 is provided with a series of notches 46 for the purpose of keeping the amount of dribble constant in spite of wear on'the packing 31 or other parts of the mechanism.

The controlling vmovements of y.the auxiliary closure 42 are obtained in this instance by the aid of a rocking lever 41 (Figs. 6, 14 and 18). This rocking lever is provided with a forked end 48 adapted to engage between the collars or flanges 49 at the upper end of the auxiliary closure 42. 'I'he lever 41 is mounted on a cross shaft 50 (Figs. 6, 7, 14 and 18). This shaft 50, as shown most clearly in Figs. 7 and 14, is journalled in a boss 5I extending from the interior wall of casing I5. The hub 52 of the lever 41 is accommodated in a recess 53 in communication with the interior of casing I5. A plug 53' (Fig. 14) closes an aperture in the wall of recess 53 opposite to the boss 5I to facilitate machining. A similar plug 54 (Fig. 18) is utilized in the upper wall of the recess 53 to permit'access to the screw 55 holding the lever 41 on the shaft 50. This shaft 50 extends` out of the casing I5 through a packing gland 56 (Fig. 7) where it is coupled to a shaft 51 operated by the control mechanism 3 hereinafter to be described, and housed in the The coupling of the two shafts 50 and 51 are shown tov best advantage in Fig. 10, where it is seen that the shaft 5I) has an extension 62 accommodated in a co1'- `responding cross slot in the end of shaft 51.

The control mechanism casing 58 is supported, as shown most clearly in Figs. 1 and 3, upon the extensions 59 of the base I as by the aid of the bolts 60. The casing 58 also has a flanged cover member 6I to enclose the control mechanism substantially completely.

Within the control mechanism casing 58-6I is a manually operable mechanism for opening the valve 4 from the closed positionl of Fig. 6. This.

manually operated mechanism is most readily explained in connection with Figs. 8, l0, 11, 12 and 16.

The control mechanism shaft 51 is journalled in the boss 63 extending into the casing 58-6I, as well as in the external boss 64. This shaft 51 carries at its inner e`nd an integrallycast lever 65. The position of this lever 65 in Fig. 15 corresponds to the fully closed position of the valve 4. In order to open the valve, it is apparent that lever must be rotated in a counterclockwise n direction as viewed in'Fig. 15. This rotation is effected by a mechanism to be described hereinafter.` It is suicient for the present to note that a latching means is provided for holding the lever `65 in its fully open position of Fig. 8. The latch 61 in that gure is shown as cooperating with a v stepped shoulders13 on the lowerfportion of the lever 65. The latch 61 and the shoulder 13 are preferably formed of hard, wearing material.]1|;v

The latch 81 is furthermore carried on a lever 68 pivoted by the aid of a shaft 69 journailed below the lever 85. Means is provided for urging the latch 61 to holding position. In this lnstance this is accomplished by the aid of a tension spring 10 extending between the ears 1| and 12 respectively on the lever 68, and a lever 65 free to rotate on shaft 51 but restrained in its angular rotation for a purpose to be hereinafter described. This tension spring 10 thus serves to urge the lever 65 to the position of Figs. 8 and 15. As the lever 85 is rotated in a counterclockwise direction to the position of Fig. 8, latch 61 is urged by the spring 10 against the shoulder 13,

and the valve stays open Auntil the latch 81 is released. Lever 85 is urged resiliently toward closing position by tension spring 10' anchored respectively at its ends to a stationary pin 203 anchored to the casing 50, and an ear 204 attached to bolt 205 for holding the parts of leyer 65 together.

The latch 81 is adapted to be operated by the aid of an arm 14 of lever 88, in a manner to be hereinafter described. It is apparent from a consideration of Fig. 8 that if arm 14 be moved in a clockwise direction, it lwill cause the latch 81 to -release the shoulder 13. An intermediate or dribble position, however, is provided, as shown in Fig. 17, where the latch 81 engages another shoulder 15 on the lever 65. The latch 61 and the shoulder 15 hold the valve shaft 50 in the dribble position preparatory to a complete closure of the valve 4. A further upward movement of arm 14 from the position of Fig. 17, releases the latch 81, and the parts are returned to .the position of Fig. 15 by action of spring 10', and

the valve 4 closes completely.

In passing from the fully open position of Fig. 8 to the dribble position of Fig. 1'7, the valve 4 is closed gradually. The valve 30closes as fast as the water enters through port 40, which being restricted, ensures gradual movement. Dribble delivery takes place around the ring closure 31 and through the notches 48.

The mechanism for rotating the lever 65 from the closed position of Fig. 15 to the open position of Fig. 8 is such that an energy storing device is used for operating the le'ver'85 and to move this lever practically out of the path of any successive operations of the energy storing device, unless a cycle has been'completed and the valve automatically closed as will be recounted hereinafter.v

The energy storing device is released before the lever is actuated. The force utilized for the movement of the lever 85 is then out of the control of the operator, and this force. completely opens the valve 8. There is thus an assurance that only complete cycles of delivery can be obtained.

The mechanism for moving the lever 65 to open position is shown most clearly in Figs. 10, 11, l2 and 16. On the inside of the cover 6| for the control mechanism 3 there is a boss 16 (Figs. 10 and l1). In this boss there is driven a stationary shaft 11. This shaft carries a rotatable disc 18 having a single ratchet tooth 18. This ratchet tooth 19, when disc 18 is rotated on shaft 11, is arranged to engage a pawl 88 and thereby to impart corresponding rotation to an actuator lever 8| jcurnalled on shaft 11. This actuator lever 8| has a plurality ofarms, as shown most clearly in Fig. 8.4 One arm 82 provides a pivotal support for the pawl Another arm 83 serves to support a guard 84 to limit the radial outward movement of pawl 00. Still another arm 84 provides an ear for the anchoring o! one end of a long tension spring 85. The other end of tension spring 85 is anchored on a pin 86 located in the casing 58. The actuating arm 81, which may be formed of hard wearing material. is also carried by the lever 8 I, and is arranged to engage and cooperatewith the lower surface of the lever 65. This engaging position of the actuating arm is illustrated in Fig. l5. In Fig. 8 the actuating arm 81 is shown as having already passed beyond the right hand endof lever 65. Lever 85 may be provided with a hard wearing insert to cooperate with the actuating arm 81.

VConsidering Fig. 8, it is seen that the tension of the spring 85 normally holds the actuating arm 81 in the position there illustrated, due to the particular relationship of the arm 84' to pvot shaft 11 and pin 86. However, as disc 18 is rotated, the tooth 19 picks up the pawl 80 on the actuator lever 8|, and rotates it in a clockwise direction. This rotation continues with a consequent tensioning or stretching of spring 85 until the arm 84 is 180 advanced from the position shown in Fig'. 8. When this position is passed, the tension of the spring 85 is irnmediately effective to complete the remaining 180 of rotation, and the actuating arm 81 is snapped quickly back to the position of Fig. 8. This snapping is permitted without'interference from the disc 18, since there is no restraint on the pawl 80 against motion in a clockwise direction. As the actuator lever 8i completes its revolution, the pawl 80 is merely lifted by the tooth 19.

The rotation of disc 18 may be accomplished by the aid of a hand lever 88 which is available for manipulation outside of the casing 58-6|. Thus, as shown most clearly in Figs. and 11, this hand lever 88 is fastened to a cross shaft 89 journalled in the boss 18. .At its inner end it carries a segmental bevel gear 90 having a hub 9| fastened to the shaft 89. This segmental gear 90 is in mesh with a bevel gear 85 fastened to the disc 18. The arrangement is such that a clockwise rotation of about 80 from the position of Fig. 11 is sufilcient to give the disc 18 its operative movement. A tension spring 82 urges the shaft 88 to the position shown in Fig. 11. This spring 92 is appropriately anchored at one end in a pin 83 -supported by the cover 6|. It is anchored at its other end to the segment 80, as by the aid of a pin 94 attached radially in the boss 9|.

When the lever 88 is moved in a clockwise direction, the disc 18 is rotated by the aid of the bevel gear 95, and there is a consequent tensioning of spring 05. As soon as the axis of`spring 85 passes alignment with the line joining the axis of shaft 11 and pin 88, the actuator 8| is snapped over to the position shown in Fig. 8. The lever 88 is then returned to the original position of Fig. 1l by the spring 92, and the tooth 19 travels in acounterclockwise direction to attain the position of Fig. l2.

The snapping over of the actuator lever 8| brings the actuating arm 81 past the end of the lever 65, which is thrown and latched in the position of Fig. 8. Any subsequent rotation of actuator 8| is ineffective while the valve is latched in this way in. open position, since the actuating arm 81 passes the end of the lever 85 without further rotating it.

As soon as the valve 4 is opened in the manner described, liquid is delivered through the valve 4 and seat `2S into the chamber 6 of the base i. After a predetermined amount of liquid is delivered, the valve 4 is closed by actuation of arm 14. This actuation, however, takes place in two steps; that is, there is anintermediate dribble position illustrated in Fig. 17. When arm 14 is rotated in a clockwise direction from the position of Fig. 17, latch 61 is moved'away from shoulder 15 and the mechanism is returned by spring '|0' to the closed position of Fig. 15.

The means fm' moving the arm Min this manner is provided by the control mechanism 3 actuated by the liquid meter 2. Thus there is a member 96 (Figs. 8, 9, 15 and 16) carried by arm 99 which is advanced from the initial position i (illustrated in Fig. l5) in a counterclockwise direction about an axis 91 in accordance with the delivery of liquid through the liquid flow meter 2. This member 96 is shown as' having advanced from the initial position of Fig. 17 to a position where it has just engaged arm 14 to cause the arm 10 to 'move latch 61 into dribble notch 15.

lFurther motion of member 96 in a counterclockwise direction win, after a short ini-,erm of delivery, again engage arm 14' to free latch 51 from the dribble notch 15, and thereby to close the valve 4 completely. After this is accomplished, the member 90 is returned automatically to its initial position in a manner to be later described.

The actuation of member 96 in the counterclockwise direction can be explained most readily by the aid of Figs. 3 and 9. Arm 99 is mounted on a hub |00 rotatable about the axis 91 by the aid of a transmission mechanism interposed between the output or delivery shaft I0| (Fig. 3) of the liquid flow meter 2, and the hub |00. This shaft |0| is adapted to be driven by any appropriate liquid iiow meter. The particular construction of flow meter 2 will be hereinafter described. It is suiiicient for the present to note that the shaft |0| is journalled near the lower portion of the casing 02 for the liquid ow meter 2, as by the aid of a boss |03. The shaft |'0I extends from inside to the outside of the casing |02. The bearing for shaft |0| is made iluid tight, as by the aid of a packing gland |04. The' shaft |0| carries a pinion |05 fastened to the shaft |0|, as by the nut |06. The pinion |05 meshes with a gear |01 rotatable about the axis 91. AThis gear |01 is carried by a shaft |08 extending into the' casing 58-6I and journalled. .in the boss |09 formed on the back of casing 58.

Rotation of gear |01 in accordance with the quantity of liquid delivered through the liquid ow meter 2 imparts .a planetary motion of revolution to a gear or pinion 0. This pinion H0 is freely rotatable on a stub shaft l fastened in the extremity of the crank arm I|2.

This crank arm ||2 is rigidly fastened to the shaft |08 as by a key and a clamp screw ||3 passing through the split hub of the crank ||2.

The planetary motion of pinion ||0 is caused to impart a reduced rate of rotation to a gear ||4 coaxial with gear |01. This is obtained by providing a gear wheel H5, also meshing with pinion ||0. During the process of delivery of the liquid, this wheel ||5 is restrained in a stationary position. The number of teeth on gear H4 is slightly less than that of the gear |l5. Thus for example, if stationary gear ||5 has 85 teeth, and if rotatable gear ||4"has 84 teeth, one i complete planetary revolution of pinion ||0 will. cause gear |4 to be rotated by an angle corre-v tion of gear H4 to correspond with the counterclockwise motion of arm 99, the planetary motion of gear i0 must be in a clockwise direction as viewed in Figs. 8, 15 and 17. .This is accomplished by causing shaft |0| driven by the liquid fiow meter 2 to rotate in a counterclockwise direction, as viewed in Figs. 8, 15 and 17.

Since the number of teeth on gear wheels |14 and H5 is substantially the same, it is unnecessary to provide different sections of pinion H0 to correspond to the difference in the tooth pitches. If there should be a wider variation, pinion H0 should be provided with two sections with accurately cut teeth to correspond respectively with both of the tooth pitches.,

It is thus seen that gear H is given a slow rotation by this mechanism. Gear ||4 is fastened as by key H6 to the extension ||1 of the hub |00. Accordingly, hub i 00 with its arm 99 is rotated i-n accordance with the motion of gear H4. Stationary gear H5- has a central aperture permitting the extension H1 to pass through it. Shaft |08 has its right hand extremity journalled in the extension H1. l

Hub |00 is also provided with an integral shaft ||8 journalled in the boss '|19 of the cover 6|.'

'I'he right hand extremity of shaft I8 extends outside of cover 6|, where it carries a pointer V| 20. This pointer cooperates with a-stationary dial |2| fastened to the outside of cover 6| The stationary dial |2| and pointer |20 can be protected as by the aid of a glass window |22. held as by a flange |23 to the circular iiange |24. formed on the cover' 6| around the dial |2|. When the member 96 is moved in a clockwise direction to the initial position of Fig. 15,"the pointer |20 also moves in a clockwise direction, to-return ultimately to zero position at the completion of the delivery cycle. Accordingly, the pointer |20 indicates on scale |2| at all times during the delivery cycle how much liquid is still to be delivered in that cycle. The dial |2| may be graduated in gallons and fractions of a gallon.

When the end of the cycle is reached corre-y sponding to the 'tripping of arm 14 from the dribble position of Fig. 17, the member 96 is returned to its initial position of Fig. 15. This is accomplished by causing gear H5 to rotate. Shaft |08 is then stationary because the liquid flow meter '2 is stalled. Accordingly, pinion I0 is prevented from revolving about axis 91, but is.

Themanner in'u'rhich this restoring rotation is imparted to the wheel I|5 may now be described.

The initial position of member 90 is determined by astop arm |25 against which the extension 98 rests. This stop arm |25 is shown as carried by a hub I2( (Figs. 9, 15 and 17). For the present, this hub |26 may be considered as stationary. It is flanged so as to provide an annular recess |21 between it and the shaft ||8. In this recess there is a coiled spiral spring |29.

outer end of the spring is anchored to the hub |26, and the inner end is anchored as by a screw |29 to the shaft H0. Now as shaft H8 is turned in a counterclockwise direction from the initial position of Fig. 15, the inner end of the spring |28 is wound up. It is permitted to unwind and impart reversed rotation to shaft H8 (and consequently to gear H5), by releasing a latch or stop cooperating with gear H5, at the end of the delivery cycle.

In order to provide this restraint to the gear wheel H5 during the delivery cycle, it is provided With a drum |30 (Figs. 8, 9, 10, 15 and 17). Against the outer braking surface of this drum a friction roller restraint I3I is provided (Figs. 8, 10, 15 and 17). This roller restrain I3I is arranged to drop between the periphery of the wheel |30 and a sloping face |32 of the block |33. This block |33 is shown to best advantage in Fig. 10, where it is indicated as being doweled and fastened to the hub G3 of casing 50, The restraining roller I3| is mounted on apin I3@ carried by lever 05. It is provided with a large clearance with respect to this pin, so that it may be free to adjust itself properly between the cooperating surfaces of block |33 and drum |30. The roller |3I is furthermore restrained against axial removal by the vertical surface of hub 63. When the valve i is operated to the open position of Fig. 8, spring I0 urges lever 05 downwardly the roller |3| into position.

It is apparent that the roller ISI prevents clockwise rotation of wheel |30 because any attempt to move wheel |30 with the roller I3I in place would result in a tendency to carry the roller I 3| further into the tapered space between face |32 and the periphery of wheel |30.

However, at the end of the delivery cycle, the roller I3! is released by the aid of a releasing arm |35 carried bythe lever 05', and adapted to be engaged by a corresponding projection |35 on lever 55. This releasing position is indicated in Fig. 15, the valve i having been closed and roller I3I having been urged upwardly out of contact with the wheel |30. 'I'he spring 'i0 is ineffective to restrain roller lili, for there is a positive actuation of arm 05 by projection |35; and spring 'i0' is more powerful than spring lil.

Since the'pinion H0 acts in a manner to urge the drum |30 in a clockwise direction, it is un-` necessary to restrain this drum against rotation in a counterclockwise direction. The differential gearing including the elements H0, Htl and H5 serves as a powerful speed reducer, thus avoiding the need of speed reduction gears elsewhere in the mechanism. The roller I 3| which restrains wheel |30 remains always in a fixed position, with respect to the case. In this way the locking and unlocking mechanism is simplified.

In order to adjust for the quantity of liquid to be delivered in any cycle, it is merely necessary to move the stop arm |25 in an angular direction so as to vary the initial position of the member 06. This adjustment can be accomplished by the aid of mechanism illustrated in Figs.- 8, 9 and l0. rI'hus hub |26 which carries the stop arm |25, is fastened to the hub of a worm wheel |35. This worm wheel in turn is free lto rotate on shaft H8. It is operated by a Worm |37. This worm is fastened to a long shaft |32 extending through a bearing boss |39 in the cover 0I. The shaft |38 is also journalled on each side of the worm |37 as by the aid of a bracket Ifl having the1 bearing standards II and |02. Shaft |38 is accommodated in these standards. This bracket |40 can be fastened to a. boss M3 on the inside of the cover EI as by the aid of the bolt UM. In

order to rotate the worm |31, a handwheel I 45 is attached to the exposed end of shaft |38. Since the worm |31 forms an irreversible drive, it is seen that the stop arm |25 is held positively in any adjusted position.

It is apparent from the foregoing that by rotation of the handwheel |45, the worm wheel |36 and hub |26 may be rotated as desired. If it is rotated in a clockwise direction, as viewed in Fig. 15, the amount of liquid delivered in any cycle is increased. A counterclockwise rotation will serve to decrease the amount of liquid delivery in a cycle. Since arm 99 is urged resiliently against the stop arm |25 when the drum |30 is released, it is apparent that theadjustment of arm |25 in this manner will cause a corresponding adjustment of the initial position of member 96. The stop post 91 serves to limit the adjustment of arm |25 to less than one complete revolution. In this way it is assured that the tension on spring I 28 cannot be reduced or increased beyond a convenient operative range.

A brief summary of the mode of operation of the apparatus as thus far described can now be set forth.

Assuming that the valve t is closed, corresponding to the position of Fig. l5, the meter delivery shaft IOI is stationary, and there is no motion in any other part of the apparatus. If it is desired t0 cause a cycle of delivery to take place, handle B8 is operated by swinging downwardly on it, as viewed in Fig. 11. This causes the actuating arm B'I to push against the lower end of the lever 05; and this lever will be latched by the latch 6l in the open position of Fig. B. In this operation also, the roller iti has been urged by spring I0 into restraining position with respect `to the drum |30. Shaft 57, upon which lever 65 is mounted, operates shaft 50 of the valve l to lift the auxiliary closure 02 and there by ultimately to open the valve to the open po sition of Fig. 18.

The liquid is then free to flow through the valve l to chamber 0; and from chamber ii through the liquid fiow meter 2, thence to chamber 'l and out through delivery pipe I2. The liquid flow meter 2 now serves to rotate the meter delivery shaft IIlI. 'Ihis meter delivery shaft imparts a planetary motion to pinion H0. Since drum I 30 is maintained in a stationary position, this planetary motion results in a counterclockwise rotation of gear Illl, and therefore of hub |00, arm 99, and member 00. This rotation continues until near the end of the delivery cycle,

-when member 9B trips the arm lli, causing the latch 5l' t0 engage against dribble shoulder 'i5 of lever 65, as illustrated in Fig. 17. In this dribble position the valve i is almost but not quite completely closed, and delivery of liquid at a reduced rate is still accomplished. After a short further counterclockwise rotation of member 06, the trip arm ifi is again tripped by member 90, and the lever B5 returns to the position of Fig. l5. In this position the roller I3| is released and valve l is returned to the closed position of Fig. 6. As soon as the valve closes, the meter delivery shaft I0| is stopped, and pinion H0 is maintained against planetary motion. The drum |30, however, is released and spring |20 acts on the drum to rotate it in a clockwise direction through the intermediary of the shaft Ht. This clockwise rotation of drum |30 causes a similar clockwise rotation of wheel H5 and wheel lill; and the member is returned to toV the initial position of Fig. 8, where it is yieldingly 7o urged against stop arm |25. The cycle can then be started again as above described. In case of failure of the device to close the valve 4, continued motion of member 96 will move arm,14 positively to urge the roller |3| upwardly by contacting the boss 206 depending from arm 65'. The roller 3| is thus released. Therefore the drum |30 can continue to rotate in a clockwise the valve 4 in an emergency before the complechamber 1, and as a cover therefor.

tion of a delivery cycle, this can be accomplished by rotating handwheel |45 to rotate the stop'arm |25 in a clockwise direction until the arm 'i4 is tripped to the starting position. Ordinarily, however, a padlock can be snapped through a hole in the handwheel |45 to prevent unauthorized adjustment.

The liquid flow meter 2, which operates to drive the delivery shaft |0| is shown in this instance as enclosed by the casing |02 which is in communication with the chamber 6 of base The casing |02 may be.provided with a flange |46 (Figs. l, 2, 3 and 6) by the aid of which it may be fastened to the top of base As shown most clearly in Fig. 3, the distance between inner surfaces of the end walls of casing |02 correspond with the width of the base Appropriate packing may be interposed between the iiange |46 and the top of base I to render the casing |02' iiuid tight, and thereby to provide a tight cover for chamber 6.

The liquid delivered through valve 4 passes through chamber 6 and upwardly through both sections of chamber 6 into the casing. The chamber "i, as will hereinafter be described, is sealed oil from the casing |02, except for provisions to pass the liquid through the metering elements.

The casing |02 is also shown as provided with a dome or bell |41 to accommodate certain parts of the apparatus which will hereinafter appear.

The metering of the liquid is accomplished. by the aid of two or more metering cylinders such as |48 and |49 (Figs. 3 and 19). These cylinders are mounted for oscillation on an axis transverse to the cylinder axis, upon opposite sides of an intermediate hollow column |50. This hollow column is shown tjbest advantage in Figs. 3, 4, 6 and 19. The manner in which this hollow column supports the cylinders |48 and |49 will be detailed hereinafter.

The hollow column |50 is divided bya central wall I5! into two compartments |52 and |53. The compartment |53 is open at the bottom of the column |50,`which in turn is in communication with the chamber 1 in base and thus with the outlet conduit |2. For this purpose the hollow column |50 is provided with the ange |54, appropriately fastened to the top oi the base I, to form a uid tight connection with the inlet Compartment |52 is in communication with the interior of the casing |02, as by the aid of an upstanding conduit |55 extending almost to the top of y vthe bell |41.

' liquid passing through the metering cylinders minimized by the washing eflect of the liquid' passing downwardly through the conduit |55.-ff'

It is also to be understood that the hollow=riol umn |50 prevents direct communication between the inlet chamber 6 and outlet chamber 1, where-` by the communication from inlet to outlet must Y be by way of the metering cylinders |48 and |46 Sinceboth cylinders are substantially identical, a description of cylinder |49 is deemed suicient. This cylinder is provided with acircular boss |51 journalled for oscillation in a recess in the left hand wall of the column |50. .The uppper head |58 of cylinder |49 is provided with a boss |59 serving as a guide for the piston stem |60. This piston stem passes completelythrough the piston |6| and is fastened thereto, as by the pin |62 (see cylinder |40). This pin passes through the central boss |63vof the piston.

The stem is furthermore guided in the lower flanged head |64 of the cylinder |49, which has a reentrant tapered portion, the piston |6| telescoping over it in its innermost position, indi- Y cated by the right hand cylinder |40 and piston |6| (Fig. 3). Since the piston |6| is thus guided at opposite extremities of its stem |60, there is no tendency to cramp the piston in its cylinder, and the piston can be moved with a smooth sliding t, without packing. l This arrangement indeed serves to render the 'meter accurate even upon Wide temperature variations of the liquid being measured, so as to deliver the same weight of liquid at all times.

The head |64 is made reentrant -for the purpose of permitting the entry of thejcranltsV |15 and |16 which drive the .delivery shatgililrby connection to the stemsV |60. The arrangement is such that liquid may pass from the compartment |52 into the upper and lower portions ofthe cylinders |48 and |49, but not necessarily in' phase, whereby liquidil pressure is` exerted upon the pistons |5| in a direction to operate the cranks and thus to rotate the delivery shaft |13. The control of the passage of liquid from the intake compartment |52 to the two chambers in the interior of each of the cylinders |48 and |49 and then into the outlet compartment |53 may n ow Y be described. i

Each of the cylinders |48 and |49 is provided with a wing-like port controlling flange |65 or |66. 'I'hese flanges overlap the opposite sides of the hollow column |50, as shown most clearly in Fig. 19, and are maintained in uid tight relationship with these walls by the pressure of the liquid exerted in casing |02 and surrounding the cylinders |48 and |49. Each of the cylinders |48 and `|49 is provided with a -pair of axially spaced apertures or ports |61 andA |68 adjacent the co1- umn |50. These apertures, as shown most clearly in Fig. 4, are sector shaped, and their axis of symmetry is parallel to the axis of the corresponding cylinder. The upper ports |61 control ingress and egress of liquid to the cylinders above the pistons IBI; Vand the lower ports |68 control the ingress and egress of liquid to the cylinders below the pistons |6l.

During the oscillation of the cylinders, ports |61 are intended to be placed in alignment a1- ternately with correspondingly shaped apertures or ports |69, |10; and ports |68 are intended to be placed in alignment alternately with correspondlng shaped ports |1| and|12. The ports |69, |10, |1| and |12 are located in the contiguous walls of the hollow column |50. Of these aper- Cil tures, the apertures and |12 are in communication with the intake compartment I 52; and apertures |69 and |1| are in communication with the outlet compartment |53.

When the axis of either cylinder |48 and 49 is parallel with the axis of the hollow column |50, the ports |61 and |68 are disposed respectively between apertures |69 and |10, and between aper- Furthermore, ports |61 and |68 have an angular extent insuicient to bridge these apertures when they are in this central portion (Fig. 4).

Now let it be assumed that a cylinder, such as |49, is displaced from this parallel position so as to place port |61 in communication with aperture |10, and port |68 in communication with aperture I1|. In this position the upper chamber of cylinder |49 is in' communication with the intake compartment |52 and this part of cylinder |49 is lled from this intake compartment. On the other hand the lower part of the cylinder |49 deiined by the lower surface of piston |6| is in communication with the outlet compartment |53. The pressure of the liquid in the upper part of the cylinder |09 urges the piston |6| downward to pass the liquid from the lower half of the cylinder |49 into the compartment |53 through the ports |68 and l1|, and thence to outlet chamber 1 of base The downward force exerted on piston |6| by the pressure of the liquid is utilized' to rotate the crank shaft |13 which is journalled in the boss |10 extending between the walls of column |50. This crank shaft |13 carries cranks |15 and |16 at its opposite ends. Crank |15 is displaced 90 from crank |16 so that there is never a simultaneous dead center position of both cylinders |66 and |69. The crank |15 for cylinder |66 is connected to the stem |60 by the aid of the clevis |11.

The stern |60 for cylinder |69 is connected to its crank |16 in a manner shown most clearly in Fig. 5. This connection includes a clevis |16 joined to the end of the stem |60. The crank pin |19 carried by the crank |16, however, is located in an eccentric |80, intermediate the clevis |16 and pin |19. It is apparent that by adjusting the relative angular position of eccentric |86, the length of the crank stroke can be varied. This is provided for in order to make it possible to calibrate the liquid ow meter 2. In the design shown, each of the cylinders |68 and |69 is intended to deliver say a pint of liquid for one complete stroke. By the aid of the adjustable eccentric |6|), the desired amount of delivery by the operation of the two cylinders |06 and |09 can be very accurately adjusted.

In order to make it possible to gain access to the eccentric |90, the left hand wall of casing |02 (Figs. 2 and 3) can be provided with a removable cover |8| opposite the place where the eccentric passes in the operation of the mechanism. The eccentric |60 may be held in adjusted position by the aid of a clamp nut |62 threaded on the threaded end of the pin |19, and clamping the eccentric |80 between the nut |82 and the contiguous face of the crank |16.

The cylinders |48 and |69 being-free to oscillate about a transverse axis makes it unnecessary to provide a connecting rod between the piston stems |60 and the cranks |10 and |16.

It is obvious that when crank |16 associated with cylinder |49 makes a complete revolution, it causes a complete oscillation of the cylinder |69 about its transverse axis. In the position shown in Fig. 6, the extreme position in the clockwise direction is indicated. As crank |16 is urged downwardly by the liquid pressure in the upper part of the cylinder |49, as heretofore mentioned, the cylinder |49 begins its counterclockwise oscillation. When the crank 16 has reached its lowermost position, the communication between all of the ports associated with cylinder |49 is ended. This corresponds to a position whereV substantially all of the liquid in the lower part of the cylinder |49 has been passed to the outlet compartment |53, and where the upper portion of the cylinder |49 attains its maximum volume. The crank' shaft |13, however, continues its 1'0- tation in a counterclockwise direction as viewed in Fig. 4, because in this position, the crank |15 is now intermediate between its lowest and highest position, and cylinder |48 has been oscillated to a position where its lower port |68 is in communication with the intake port |12. The upper port |61 of cylinder |48 is in communication with the outlet port |68, and liquid is delivered from the upper end of cylinder |48 to the outlet compartment |53. The crank |15 is thus moved upwardly by piston |6| in cylinder |48, to continue the counterclockwise rotation of shaft |13, as viewed in Fig. 4. Upon continued operation, the piston |6| in cylinder |08 reaches the endof its upward travel. The crank |16 in association with cylinder |49 being 90 behind crank |15,

the cylinder |49 has now reached its extreme point in its oscillation in a counterclockwise direction as viewed in Fig. 6. In that position, port |6| is in communication with port |69, and liquid is delivered from the top of cylinder |49 through these ports to the outlet compartment |53. At the same time, port |60 of cylinder |49 is in communication with port |12, so that liquid enters from the intake compartment |52 into the lower portion of cylinder |69 below the piston |6| `and urges the piston |6| upwardly. This continues until crank |16 reaches its uppermost position, when again the cylinder |49 reaches its intermediate position between its extreme limits of oscillation. The piston |6| of cylinder |40 however, has been urged downwardly to oscillate the cylinder |46 in the contrary direction. At this phase oi' the cycle, the ports |61 and |10 of cylinder |60 are in communication so that intake pressure is eiTective on the top of piston |6| in cylinder |49; and this continues until the lowermost position of crank |15 is reached as illustrated in Fig. 3.4

Continued operation, as is apparent, will repeat thecycle as just described. For each position of the cylinder |66 and |09 there is a liquid pressure eected on one or the other side of one or both pistons |6| to continue the rotation in the counterclockwise direction as viewed in Fig. 4.

It is also apparent that the liquid flowing from the intake compartment |52 is later passed, by the pistons |6|, into the outlet compartment |53, the amount delivered atv each stroke being determined by the volume of the piston displacement.

The crank shaft |19 is coupled to the delivery shaft |0| as by the aid of a forked arm |03 (Figs. 3 and 4) which is engaged by an extension |84 of the crank pin |85.

It is apparent that the pressure oi the liquid on the external surfaces of cylinders |48 and |49 would cause excessive friction between the flanges |65, |66 and the walls of the hollow column |50. In order to relieve this pressure, each of the hollow bosses |51 formed on the cylinders |46 and |49 is threaded for the accommodation of the threaded posts |86 and |81 extending inwardly toward each other. These threaded. postsl are held in adjusted position -in the bosses |51 by the aid of the lock nuts |88 and |89. The inner ends of these threaded bosses carry the heads |90 made of hard wearing material, such as case hardened steel or the like, and are adapted to be in frictional contact. By appropriate adjustment of the posts |86 and |81, all of the frictional force may be concentrated on the hardened contacting surfaces of the heads `|90. These surfaces wear at a much slower rate than the contacting surface of flanges |65 and |66. Accordingly the force exerted by the liquid pressure in the casing |02 is taken up by the hardened surfaces, and the flanges |65 and |66 are merely in fluid tight contact with the walls of the hollow column |50.

It is apparent that the liquid pressure in casing |02 serves to hold the cylinders |48 and |49 against the hollow column |50. However, in order to maintain these cylinders in place even for very low pressure operation, tension springs |9| (Fig. 4) may be provided between the ears |92 formed on the cylinders to urge the two cylinders toward each other.

Provisions are made for withdrawing all of the liquid from the casing |02 and from the associated chambers 6 and 1 should it be desired to remove casing |02 or valve 4, or to inspect the interior .of these devices. For this purpose, small pet cocks, such as |93, can be provided in thebase communicating respectively with chambers 6 and 1. Furthermore, a similar pet cock |96 (Figs. l and 2) may be provided in the top of the bell |01 to permit the escape of any accumulated air when the apparatus is installed.

In order to relieve casing 02 from excessive liquid pressures, a spring pressed safety valve may also be provided in the bell |01. This is shown most clearly in Figs. 2 and 6. The safety valveis formed by an annular seat |95 supported by a spider |96. Thisseat |95 is held to the exterior wall of bell |611 as by bolts |91. Appropriate gaskets may be used between the seat |95 and the corresponding flange formed in the bell The closure |98 for the safety valv'e is carried by a central stem |90 guided in the boss 200 formed integral with spider |96. A compressionv spring 20| surrounds the boss 200 and engages a collar 202 carried by the stem |99. 'I'he left hand end of spring 20| is in contact with the spider |96. By appropriate choice of spring 20|, it is apparent that the maximum pressure attainable in casing |02 before this spring can be compressed to urge closure |98 to open position may be predetermined.

The mode of operation of the liquid flow meter is apparent from the foregoing. The pressure of the liquid being metered is utilized to operate the pistons |6| in the oscillating cylinders |46 and |49; and the oscillations of these cylinders are utilized-to close and open the ports in communication with the intake compartment |52 and the outlet compartment |53. In this way reciprocations of the pistons |6| -are obtained. These reciprocations in turn are transformed into a rotary motion of crank shaft |13 and a corresponding rotary motion of the liquid iiow meter delivery shaft Due to the reentrant form of the heads |64, the mechanism may be arranged in a compact manner in the casing |02.

As hereinbefore described, the counterclockwise rotation of shaft |13 as viewed in Fig. 4 imparts a counterclockwise rotation to gear`|05, and gear |01 is given a clockwise rotation, .as viewed in Figs: 8, 15 and 1'7. This is the correct direction of rotation to impart a counterclockwise motion of the operating member 96, for' determining the end of the delivery cycle.

What is claimed is: y1. In a liquid measuring device, a liquid flow meter, a valve for the liquid, and a control to return said member to a denite initial position Without affecting the meter. l

2. In a device of the character described, a valve controlling owv of a liquid, a movable member for controlling the valve after a quan tity of liquid 'is delivered, said member being returnable to an initial position at the completion of the delivery cycle, and means whereby the member is moved in one direction toward its controlling position and then returned to the initial position, comprising a planetary gear revolved about an axis in accordance with the,

liquid delivered, a pair of gears in mesh with the planetary gear, means urging one of said gears in one direction, means for restraining said one of said gears, whereby rotation is imparted to the other of said gears by the planetary gear, and means responsive to the arrival of the member to cycle completion position for releasing the restrained gear for returning the member to initial starting position.

3. In a device of the vcharacter described, 'a valve controlling flow of a liquid, a movable member for controlling the valve after a quantity of liquid is delivered, said member being returnable to an initial position at the completion of thedelivery cycle, and means whereby the member is moved in one direction toward its controlling position and then returned to the initial position, comprising a planetary gear mechanism having a planetary gear and two coaxial gears rotatable` about the axis of revolution of the planetary gear and in mesh therewith, means' constantly urging one of said gears ingone direction, a connection between one oil the other gears and the member, means for actuating the third one of the gears in accordance with the amount Aof liquid delivered, means 'for restraining the constantly urged gear, and means for removing the restraint when the member reaches the end of the delivery cycle.

4. In combination, a valve having a piston closure member as well as an auxiliary closure memberl cooperating with a port in the piston closure member, and also a cylinder for the piston closure and in constant communication with a source of liquid through a restricted opening,

smaller than the port in the piston closure member, whereby upon opening of the said port, the

liquid pressure upon the discharge side of the piston closure urges the piston closure toward the auxiliary closure, and means to cause the auxiliary closure rst to move the piston closure member to a dribble position with respect to its seat, and then later to complete the closing movement of the piston closure.

5. In combination, a valve having a piston closure member as well as an auxiliary closure member cooperating with a port in the pistonclosure member, and also a cylinder for the piston closure and in constant communication with the source of liquid through a retricted opening, smaller than the port in the piston closure member, whereby upon opening of the said port, the liquid pressure upon the discharge side o the piston closure urges the piston closure toward the auxiliary closure, and means to cause the auxiliary closure rst to move the piston closure member to a dribble position with respect to its seat, and then later to complete the closing movement of the piston closure, said piston closure member having a seriesof notches for defining the dribble opening when the piston closure approaches closing position.

6. In a liquid metering device, a control valve, a liquid now meter, a control mechanism between the iiow meter and the valve, adapted to cause the valve to close at the end of a delivery cycle, and means for openingthe valve to start the cycle, comprising a rotatable member, a spring connected to the member at a distance from the .axis of rotation, whereby upon movement of the member to a definite position, the energy stored in the spring by the motion of the member will complete the movement thereof, an actuator lfor the valve moved by said member when the member is under the influence of the spring, to open the valve, latching means for holding said actuator in open position and out of the path 4of the member, and means for rotating said member toward open position, said means being so arranged that the movement of the member under the influence of the spring is unimpeded by the means for rotating it.

- '1. In a liquid measuring system, a valve having a closure 'member and a seat therefor, means for opening the valve, and means for closing the valve in at least two steps, comprising means operating first in response to the delivery of an amount of liquid less than the predetermined measured quantity to cause the pressure of the liquid directly to move the closure partly to its,

seat, and then in response to the, delivery of the predetermined measured quantity, to cause the pressure of the liquid directly to close the valve completely.

8. In a liquid measuring system, a valve having a closure member and a seat therefor. means for opening the valve, and means to cause the pressure of the liquid to close the valve in at least two steps, comprising a latch operating to cause the pressure of the liquid to hold the closure in either of two positions, a member movable in accordance with the quantity of liquid delivered, and an operatlng arm connected to the latch in the path of said member and arranged to be moved by the member in succession for operating the latch in succession to permit the valve to be moved in steps to closed position by the pressure of the liquid.

9. In a control mechanism for automatically determining measurable quantities in successive measured pre-adjusted amounts, a member movable from an initial position to a position-sorresponding to the termination of the measuring function, means whereby said initial position may be adjusted to adjust the quantity to be measured. said termination position being ilxed, and a drive mechanism for advancing the member to the termination position as well as thereafter to return said member to the adjusted initial position, comprising a pair o! gears, one for advnncinl said member, a force exerting means urging the member toward its initial position, and a releasable restraint for said other gear and arranged to be released in response to the arrival of the member to its termination position, for permitting said member to move to its initial position.

10. In a control mechanism for automatically determining measurable quantities in successive measured pre-adjusted amounts, a member movable from an initial position to a position corresponding to the termination of the measuring function, an indicating mechanism operatively joined to the member for indicating its position, means whereby said initial position may be adjusted to adjust the quantity to be measured, said termination position being fixed. and a drive mechanism for advancing the member to the termination position as well as thereafter vto return said member to the adjusted initial position, comprising a pair of gears,`one for advancing said member, a force exerting means urging the member toward its initial position, and a releasable restraint for said-other gear and arranged to be released in response to the arrival of the member to its termination position, for permitting said member to move to its initial position.

11. In a control mechanism for automatically determining measurable quantities in successive measured pre-adjustedy amounts, a member movable from an initial position to a position correspondlng to the termination of the measuring functions, an indicating mechanism operatively joined to the member for indicating its position, means whereby said initial position may be adjusted to adjust the quantity to be measured, said termination position being fixed, and a drive mechanism for advancing the member to the termination position as well as thereafter to return said member to the adjusted initial position, comprising a pair of coaxial gears, one of them joined to the member, the other having freedom of motion about its axis, a releasable restraint for the other gear, and arranged to be released in response to the arrival ofthe member to its termination position, planetary gearing engaging said gears and having an axis adapted to be revolved about the axis of the gears for rotating said one gear to advance said member, and means urging the said one gear in a direction to rotate the planetary gearing to operate the said one gear for returning said member to its initial uposition when the restraint imposed upon the rotation of the planetary gearing about its own axis is removed by removal of the restraint upon the other of said gears. i

FRANCIS WALTER GUIBERT. FREDERIC B. FUILER. 

